Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual lead teve uma temporada de 2009-10?
 ###Tabelas: CREATE TABLE some_differences_in_relation_to_later_editions_of_the_roman_calendar (some_differences_in_relation_to_later_editions_of_the_roman_calendar_id AUTO_INCREMENT PRIMARY KEY, Date INT, Doubles, I Class INT, Doubles, II Class INT, Greater Doubles INT, Doubles INT, Semidoubles INT, Total INT) CREATE TABLE easternmost_summits (easternmost_summits_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Mountain Peak VARCHAR, Region VARCHAR, Mountain Range VARCHAR, Location VARCHAR) CREATE TABLE teams (teams_id AUTO_INCREMENT PRIMARY KEY, Season VARCHAR, Skip VARCHAR, Third VARCHAR, Second VARCHAR, Lead VARCHAR, Alternate VARCHAR, Events VARCHAR) CREATE TABLE topscorers_in_order_of_league_goals (topscorers_in_order_of_league_goals_id AUTO_INCREMENT PRIMARY KEY, Player VARCHAR, Club VARCHAR, League INT, FA Cup INT, FA Trophy INT, League Cup INT, Total INT) CREATE TABLE hydro_power_stations (hydro_power_stations_id AUTO_INCREMENT PRIMARY KEY, S.no. INT, Power Plant VARCHAR, State VARCHAR, Commissioned Capacity (MW) INT, year of commission INT)  
SELECT Lead FROM teams WHERE Season = 2009-10